Towards Dry Machining of Titanium-Based Alloys: A New Approach Using an Oxygen-Free Environment
Hans Jürgen Maier,
Sebastian Herbst,
Berend Denkena,
Marc-André Dittrich,
Florian Schaper,
Sebastian Worpenberg,
René Gustus,
Wolfgang Maus-Friedrichs
Affiliations
Hans Jürgen Maier
Institut für Werkstoffkunde (Materials Science), Leibniz Universität Hannover, 30823 Garbsen, Germany
Sebastian Herbst
Institut für Werkstoffkunde (Materials Science), Leibniz Universität Hannover, 30823 Garbsen, Germany
Berend Denkena
Institut für Fertigungstechnik und Werkzeugmaschinen (Institute of Production Engineering and Machine Tools), Leibniz Universität Hannover, 30823 Garbsen, Germany
Marc-André Dittrich
Institut für Fertigungstechnik und Werkzeugmaschinen (Institute of Production Engineering and Machine Tools), Leibniz Universität Hannover, 30823 Garbsen, Germany
Florian Schaper
Institut für Fertigungstechnik und Werkzeugmaschinen (Institute of Production Engineering and Machine Tools), Leibniz Universität Hannover, 30823 Garbsen, Germany
Sebastian Worpenberg
Institut für Fertigungstechnik und Werkzeugmaschinen (Institute of Production Engineering and Machine Tools), Leibniz Universität Hannover, 30823 Garbsen, Germany
René Gustus
Clausthal Centre for Material Technology, Leibnizstraße 9, 38678 Clausthal-Zellerfeld, Germany
Wolfgang Maus-Friedrichs
Clausthal Centre for Material Technology, Leibnizstraße 9, 38678 Clausthal-Zellerfeld, Germany
In the current study, the potential of dry machining of the titanium alloy Ti-6Al-4V with uncoated tungsten carbide solid endmills was explored. It is demonstrated that tribo-oxidation is the dominant wear mechanism, which can be suppressed by milling in an extreme high vacuum adequate (XHV) environment. The latter was realized by using a silane-doped argon atmosphere. In the XHV environment, titanium adhesion on the tool was substantially less pronounced as compared to reference machining experiments conducted in air. This goes hand in hand with lower cutting forces in the XHV environment and corresponding changes in chip formation. The underlying mechanisms and the ramifications with respect to application of this approach to dry machining of other metals are discussed.
